Can you use a galvanised bolt with a stainless steel nut? Or brass and stainless steel?

Join us as Graham Sussex from the Nickel institute discusses the corrosive effect of mixing metals and why both area ratios and potential differences are not the only electrochemical issues.

Possible solutions include excluding water, changing materials, good insulation - and not just paint - while changing the wetting fluid can have dramatic results. Practical questions such as how far do galvanic effects spread down a pipe or across a surface can be critical. The clear differences between stray current and galvanic corrosion effects will be explained.

Until recently, potential differences were the major measuring stick but for complicated mixtures, Mil Spec 889D has recently been used to predict corrosion currents. Multiple good and bad examples will be shown from consulting life.

The 3 main takeaways from this presentation are:
1. Dissimilar metal conditions where you should not be concerned with galvanic corrosion.
2. Dissimilar metal conditions where you should be concerned with galvanic corrosion.
3. Some of the various steps that can be taken to avoid galvanic corrosion